Re: [PATCH v2 3/3] drm: panel: Add a driver for Generic MIPI-DSI/DPI(+SPI) panels

[kernel test robot <lkp@intel.com>]

Hi Hironori,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.14-rc5 next-20250305]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Hironori-KIKUCHI/dt-bindings-vendor-prefixes-Add-hothmi-vendor-prefix/20250226-192724
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20250226112552.52494-4-kikuchan98%40gmail.com
patch subject: [PATCH v2 3/3] drm: panel: Add a driver for Generic MIPI-DSI/DPI(+SPI) panels
config: csky-randconfig-r112-20250306 (https://download.01.org/0day-ci/archive/20250306/202503061541.2JX2lTlc-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250306/202503061541.2JX2lTlc-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503061541.2JX2lTlc-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/panel/panel-mipi.c:407:26: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:408:27: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:410:20: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:424:29: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:425:28: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:426:29: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:427:33: sparse: sparse: cast to restricted __be16
>> drivers/gpu/drm/panel/panel-mipi.c:429:27: sparse: sparse: cast to restricted __be32
   drivers/gpu/drm/panel/panel-mipi.c:854:23: sparse: sparse: cast to restricted __be32
   drivers/gpu/drm/panel/panel-mipi.c:856:26: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:857:46: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:858:47: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:859:42: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:861:26: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:862:46: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:863:47: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:864:42: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:866:23: sparse: sparse: cast to restricted __be32
   drivers/gpu/drm/panel/panel-mipi.c:1047:22: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:1048:23: sparse: sparse: cast to restricted __be16
   drivers/gpu/drm/panel/panel-mipi.c:1049:27: sparse: sparse: cast to restricted __be32
   drivers/gpu/drm/panel/panel-mipi.c: note: in included file (through include/linux/mutex.h, include/drm/drm_mipi_dbi.h):
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true

vim +407 drivers/gpu/drm/panel/panel-mipi.c

   392	
   393	static int panel_mipi_read_firmware(const struct device *dev,
   394					    struct panel_mipi *mipi,
   395					    const struct panel_firmware *firmware)
   396	{
   397		int rotation;
   398		int err;
   399	
   400		err = panel_mipi_load_commands(mipi, firmware->commands.data,
   401					       firmware->commands.size);
   402		if (err) {
   403			dev_err(dev, "firmware: Malformed command sequence\n");
   404			return err;
   405		}
   406	
 > 407		mipi->width_mm = be16_to_cpu(firmware->config->width_mm);
   408		mipi->height_mm = be16_to_cpu(firmware->config->height_mm);
   409	
   410		rotation = be16_to_cpu(firmware->config->rotation);
   411		if (rotation == 0)
   412			mipi->orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL;
   413		else if (rotation == 90)
   414			mipi->orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
   415		else if (rotation == 180)
   416			mipi->orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
   417		else if (rotation == 270)
   418			mipi->orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
   419		else {
   420			dev_err(dev, "firmware: Invalid rotation %u\n", rotation);
   421			return -EINVAL;
   422		}
   423	
   424		mipi->reset_delay = be16_to_cpu(firmware->config->reset_delay);
   425		mipi->init_delay = be16_to_cpu(firmware->config->init_delay);
   426		mipi->sleep_delay = be16_to_cpu(firmware->config->sleep_delay);
   427		mipi->backlight_delay = be16_to_cpu(firmware->config->backlight_delay);
   428	
 > 429		mipi->bus_flags = be32_to_cpu(firmware->config->bus_flags);
   430	
   431		return 0;
   432	}
   433	

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